David Alexander Sharp Sisi (born 5 February 1993) was a German-born Italian professional rugby union player who primarily played lock for Zebre Parma of the United Rugby Championship.

He had also represented Italy on 30 occasions at international level, having made his test debut against Scotland during the 2019 Six Nations Championship.

Sisi is of Italian descent, and qualifies to play for Italy through his paternal grandparents and his father Carlo.

At 16, he was offered a place on the London Irish AASE scheme; joining the London Irish academy and completing his schooling part time at St. Paul’s college, and afterwards accepting a full time contract with London Irish; at the time becoming their youngest player to represent their first team.

Sisi moved to Bath where over the course of 4 years he also spent loan periods to Yorkshire Carnegie (formally Leeds Carnegie), London Scottish and back to London Irish.